WO1987005847A1 - Appareil de meulage jetable equipe d'un moyeu de montage incorpore - Google Patents

Appareil de meulage jetable equipe d'un moyeu de montage incorpore Download PDF

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Publication number
WO1987005847A1
WO1987005847A1 PCT/US1987/000716 US8700716W WO8705847A1 WO 1987005847 A1 WO1987005847 A1 WO 1987005847A1 US 8700716 W US8700716 W US 8700716W WO 8705847 A1 WO8705847 A1 WO 8705847A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinding
drive member
flange
disposable drive
backing
Prior art date
Application number
PCT/US1987/000716
Other languages
English (en)
Inventor
Joseph Hartley Mackay, Jr.
Original Assignee
Mackay Joseph Hartley
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/847,793 external-priority patent/US4694615A/en
Priority claimed from US07/005,813 external-priority patent/US4754578A/en
Priority claimed from US07/005,812 external-priority patent/US4760670A/en
Application filed by Mackay Joseph Hartley filed Critical Mackay Joseph Hartley
Publication of WO1987005847A1 publication Critical patent/WO1987005847A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/16—Bushings; Mountings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings

Definitions

  • This invention relates generally to abrasive finishing articles and more particularly to abrasive grinding apparatus having a mounting hub permanently affixed thereto with the combination adapted for attachment to an appropriate portable power tool. More ⁇ specifically the invention has application to disposable depressed center grinding wheels.
  • the devices utilized in the prior art for providing the disposable grinding wheel assembly including the permanent affixed mounting hub generally provide the service intended.
  • die-cast mounting hubs which include as an integral part the backing flange there is no additional clamping force exerted upon the grinding wheel as it is being rotated by the power tool.
  • die-cast mounting hubs are relatively bulky, take up space and add substantial weight and additional cost to the completed product.
  • a grinding apparatus having a drive member non-removably affixed thereto for mounting on a rotatable spindle of a power tool.
  • the drive member includes a backing flange on one side of the apparatus and a retaining nut positioned on the opposite side of the apparatus from the backing flange.
  • the nut extends through an opening from the face toward the back of the apparatus and has a radial flange at one end thereof seated against the face of the apparatus and protrusion means extending from the other end thereof for non- removably securing the retaining nut and the backing flange together on the apparatus without the use of adhesives.
  • Loosely retained upon the power tool spindle is a base member which engages the outer surface of the backing flange to apply pressure to the flange during operation of the apparatus.
  • a pressure cap member may be affixed to the protrusion means.
  • the pressure cap defines a central opening through which the power tool spindle extends to engage the nut.
  • FIGURE 1 is a cross sectional view of a disposable grinding wheel assembly constructed in accordance with the principles of the present invention and mounted in operable position on the spindle of a power tool;
  • FIGURE 2 is an exploded view of the structure as illustrated in FIGURE 1;
  • FIGURE 3 is a cross sectional view of a backing flange constructed in accordance with the present invention
  • FIGURE 4 is a cross section view of a retaining nut constructed in accordance with the principles of the present invention.
  • FIGURE 5 is a cross sectional view of the retaining nut of FIGURE 5 after being upset
  • FIGURE 6 is an alternative construction of a spindle base assembly constructed in accordance with the present invention for use on small grinding wheels;
  • FIGURE 7 is a cross sectional view of an alternative embodiment of the grinding wheel assembly constructed in accordance with the principles of the present invention including a pressure cap and mounted in operable position on the spindle of a power tool;
  • FIGURE 8 is a cross sectional view showing construction of the pressure cap constructed in accordance with the present invention.
  • FIGURE 9 is a cross sectional view of another embodiment of a disposable grinding wheel assembly constructed in accordance with the principles of the present invention.
  • FIGURE 10 is a cross sectional view of a backing flange constructed in accordance with the present invention
  • FIGURE 11 is a cross section view of a retaining nut constructed in accordance with the principles of the present invention
  • FIGURE 12 is a cross sectional view of the retaining nut of FIGURE 5 after being upset
  • FIGURE 13 is an alternative construction of a spindle base assembly constructed in accordance with the present invention for use on small grinding wheels;
  • FIGURES 1 through 5 there is illustrated a preferred embodiment of a disposable grinding apparatus assembly constructed in accordance with the principles of the present invention.
  • a depressed center grinding wheel 10 has a disposable drive member assembly 12 permanently affixed thereto so that the grinding wheel may be attached to the spindle 14 of an appropriate power tool 16.
  • a disposable mounting hub or drive member is constructed in such a manner that when the grinding wheel is placed in operation upon the spindle 14 the grinding wheel 10 is placed in compression and the more force which is applied to the grinding wheel during utilization thereof, the greater the operational compression becomes.
  • the driving member the spent grinding wheel may be easily removed from the spindle for disposal without the utilization of hand tools or the like.
  • the grinding wheel 10 includes a back surface 18 and a front surface 20.
  • the central portion of the grinding wheel is depressed as viewed from the front thereof and as is shown at 22, with a corresponding central raised portion 24 on the back thereof.
  • a centrally located aperture 26 is provided in the depressed center portion of the grinding wheel 10.
  • the purpose of the depressed center of the grinding wheel 10 is to insure that the driving member or spindle does not protrude beyond the face portion 20 of the wheel 10 and thus interfere with a workpiece during the time the grinding wheel 10 is being utilized.
  • a backing flange 28 is provided and is adapted to be snugly received on the back surface 18 of the grinding wheel 10 about the raised portion 24.
  • the flange 28 has a diameter which is less than the diameter of the wheel 10.
  • the backing flange 28 defines a second central aperture 30 therethrough which is aligned with the aperture 26 in the grinding wheel 10.
  • a pair of reinforcing ribs 32 and 34 are formed in the backing flange 28 concentrically with the opening 30.
  • the backing flange 28 is preferably stamped from sheet metal but of course could be constructed from other materials such as hard molded plastic or die cast metal should such be desired.
  • the backing flange 28 includes an inner surface 36 and an outer surface 38.
  • the inner surface 36 is disposed opposed the back surface 18 of the abrasive finishing wheel 10.
  • the inner surface 36 includes a pair of lands 40 and 42.
  • the land 40 always is formed about the outer peripheral portion of the backing flange 28.
  • the land 42 is displaced inwardly toward the opening 30 and away from the land 40.
  • the land 40 engages the back surface 18 of the abrasive finishing wheel away from the
  • the ribs 32 and 34 formed in the outer surface 38 of the backing flange 22 are continuous.
  • the continuous rib 32 is disposed between the lands 40 and 42 and over the transitional area between the depressed center and the
  • a retainer nut 44 includes a body portion 46 which is hollow and has a radially outwardly extending
  • the internal surface of the body 46 has threads 56 formed therealong for attachment to the threaded spindle 14 of the power tool.
  • the nut 44 is inserted through the aperture 26 in the grinding wheel and the aperture 30 in
  • the flange 28 from the front 20 toward the rear 18 of the grinding wheel 10.
  • the end 52 of the nut 44 extends through the opening 30 in the flange 28 for a distance not exceeding the top of the rib 34.
  • the upsetting operation causes a protrusion 56 to extend outwardly from the body 46 in such a manner as to engage the flange 28 about the outer surface 38 thereof adjacent the opening 30 therethrough and is the only means used for securing the flange 28 and the nut 44 on the wheel 10.
  • the protrusion 56 is illustrated as being continuous as is the groove 54, although it should be understood that it may be intermittent should such be desired. It should become apparent to those skilled in the art that the flange 28 and the nut 44 are mechanically secured together on the wheel 10 between the flange 48 and the protrusion 56 without the use of adhesives.
  • the nut 44 is preferably constructed from an aluminum extrusion which is then machined to provide the flange 38 and the threads 46.
  • the nut may be formed from aluminum or steel bar stock, or a metal die casting.
  • a base assembly 60 which includes a disc 62 having a first surface 64 at least part of which is adapted for engaging the outer surface 38 of the flange 28.
  • the disc 62 is held in place on the spindle 14 by a retaining member 66 which, as shown in FIGURE 1 in the preferred embodiment, may be a nylon annulus which is threadable onto the threaded spindle 14. The nylon annulus 66 will then loosely retain the disc 62 upon the spindle 14 at all times whether or not a grinding wheel is maintained in place.
  • the first surface 64 of the disc 62 defines continuous ridges 68 and 70 which engage the ribs 34 and 32, respectively, of the flange 28 as can be seen.
  • the ridges are displaced downwardly and the disc defines a chamber or pocket into which the nut 44 may be partially retracted during use.
  • the contact between the ribs and ridges is essentially a line contact.
  • the wheel 10 may usually be relatively easily removed from the power tool 16.
  • a plastic washer 67 Positioned between the opposite surface 65 of the disc 62 and the shoulder 69 on the power tool 16 is a plastic washer 67 constructed preferably of a self- lubricating plastic.
  • the washer 67 serves two functions. The first function is to accommodate power tools 16 of varying dimensional configurations.
  • the spindle 14 may vary in length requiring spacers to assure the end of the spindle does not protrude beyond the end of the nut 44 by any substantial amount.
  • the second function is to assist in removal of the wheel 10 from the power tool 16 after the wheel 10 is spent. Since tremendous forces are generated during a grinding operation, metal-to-metal surfaces, particularly of similar types, tend to bind or gall thereby necessitating the application of relatively large forces to remove the spent wheel.
  • the self lubricating dissimilar surfaces between the washer 67 and shoulder 69 and surface 65 provide an almost immediate release upon the application of minimal pressure to wheel 10. Thereafter the line contact above referred to allows easy separation of the wheel from the base assembly 60.
  • the force necessary to cause the grinding wheel 10 to be placed in compression is generated upon attachment of the spindle 14 to the threads 56 in the nut 44.
  • FIGURE 1 it will be noted that when the grinding wheel is threaded upon the spindle 14 the ridges 68 and 70 engage in a line fashion the ribs 34 and 30 on the flange. The flange is forced in a downward direction by such engagement.
  • the inner 35 surface 64 of the disc 62 provides a space or chamber 71 above the top 52 of the nut 44. This chamber 71 provides room for the nut to move upwardly during operation in a manner unrestricted by the power tool or base assembly.
  • FIGURE 6 illustrates an alternative structure similar to that shown in FIGURE 1 but specifically designed for use with smaller grinding wheels, for example, those having a diameter of five inches or less.
  • the disc in the base assembly is of smaller diameter and designed to engage only the first rib adjacent the opening through the backing flange.
  • the disc 80 defines a peripheral surface 82 which engages the top surface of the continuous rib 34 on the backing flange 28. It has been found that the smaller grinding wheels do not require the larger backing flange for satisfactory operation although it should be understood that the smaller grinding wheels operate satisfactorily with the larger backing flanges.
  • a pressure cap 90 is snapped into locking engagement with the hub assembly 12. Under these circumstances the base assembly 60 as above described will be dispensed with.
  • the pressure cap 90 includes a first rear surface 92 for engaging the surface 69 on the power tool spindle when the grinding wheel is in an operable position on the power tool 16.
  • a second or front surface 96 on the pressure cap 90 contacts the top of the continuous rib 34.
  • the pressure cap 90 is retained in position on the hub assembly 12 by a gripping rib 98 which extends radially inwardly from a downwardly depending skirt 84 on the front surface 96 of the body 84 of the pressure 13 cap 90.
  • the gripping rib 98 snaps over the protrusion 56 and engages the lip 57 on the end 52 of the retainer nut 44. At the same time the surface 74 on the continuous reinforcing rib 34 of the backing flange 28 applies a radially inwardly directed force to secure the gripping rib 98 in place in the space between the lip 57 and the periphery of the backing flange surrounding the opening 30.
  • the pressure cap 90 is constructed of molded plastic such as polypropylene, polyamide, acetal or the like.
  • the gripping rib 98 may be continuous or intermittent as desired as illustrated by the dashed lines 99.
  • the pressure cap may be easily snapped into locking position as shown in FIGURE 1 by the distributor or user before use if desired or, alternatively, at the time of assembly in the factory.
  • Such capability saves space in shipment in that the assembled wheel without the pressure cap may be packed in containers with pressure caps placed in interstices between wheels or wheels and the container. Thus a greater number of wheels may be packaged, on top of each other, in the same container.
  • the force necessary to cause the grinding wheel 10 to be placed in compression is generated upon attachment of the spindle 14 to the threads 56 in the nut 44.
  • FIGURE 7 it will be noted that when the grinding wheel is threaded upon the spindle 14 the surface 92 engages the surface 69. Force is thus transmitted through the pressure cap 90 to the backing flange 28 through the contact between the surface 96 and the reinforcing rib 34 causing the backing flange to be forced in a downward direction.
  • the interengagement between the threads 14 and 56 of the spindle and nut, respectively urge the nut upward toward the flange 28 to cause the grinding wheel to be placed in compression.
  • additional torque is applied causing the grinding wheel to be further tightened onto the spindle 14 as was the case with the base assembly 60.
  • FIGURES 9-13 there is illustrated another embodiment of a disposable grinding wheel-drive member assembly constructed in accordance with the principles of the present invention.
  • a depressed center grinding wheel 10 has a disposable drive member assembly 12 permanently affixed thereto so that the grinding wheel may be attached to the spindle 14 of an appropriate power tool shown in phantom at 16.
  • the grinding wheel 10 includes a back surface 18 and a front surface 20. As is clearly shown the central portion of the grinding wheel is depressed as viewed from the front thereof and as is shown at 22, with a corresponding central raised portion 24 on the back thereof. A centrally located aperture 26 is provided in the depressed center portion of the grinding wheel 10.
  • a backing flange 128 is provided and is adapted to be snugly received on the back surface 18 of the grinding wheel 10 about the raised portion 24.
  • the flange 128 has a diameter which is less than the diameter of the wheel 10.
  • the backing plate or flange 128 defines a second central aperture 130 therethrough which is aligned with the aperture 26 in the grinding wheel 10.
  • a reinforcing rib 132 is formed in the backing flange 128 concentrically with the opening 130.
  • the backing plate or flange 128 is preferably stamped from sheet metal but of course could be constructed from other materials such as hard molded plastic should such be desired.
  • a retainer nut 134 includes a body portion 136 which is hollow and has a radially outwardly extending flange 138. At the opposite end 142 of the body and slightly displaced therefrom there is provided a recess such as a continuous groove 144. The internal surface of the body 136 has threads 146 formed therealong for attachment to the threaded spindle 14 of the power tool. The nut 134 is inserted through the aperture 26 in the grinding wheel and the aperture 130 in the flange 128 from the front 20 toward the rear 18 of the grinding wheel 10.
  • a hollow cup-shaped member 150 is slipped over the upper portion of the retaining nut which extends beyond the flange 28 and is non-removably ⁇ secured to the nut by depressing a portion thereof into the groove 144.
  • the hollow cup spindle cup
  • the hollow cup has a side wall 152 with a radially outwardly extending flange 154 disposed at the end 156 thereof.
  • the opposite end 158 of the side wall 152 is turned inwardly and defines a third aperture 160 therethrough.
  • the inwardly turned portion of the side wall 152 also functions as a locating area for the spindle 14 of the power tool 16 thus making it relatively easy for a user to locate the grinding wheel upon the power tool 16.
  • the side wall 152 of the cap 150 may be affixed to the groove 144 of the nut by a simple staking operation to provide indentations as shown at 164 and 166 of FIGURE 1. It will be obvious to those skilled in the art that the indentations 164 and 166 may be one or more in number and may be independent or alternatively a compete continuous upset of the side wall 152 may be accomplished if desired. It will further be recognized that the continuous groove 144 may be formed in a discontinuous manner, that is, a plurality of recesses should such be desired. In any event the cup 150 is affixed to the nut 134 in a non-removable fashion but in such a manner that the cup and nut may be urged relatively toward each other to place the grinding wheel 10 in compression.
  • the force necessary to cause the grinding wheel 10 to be placed in compression is generated upon attachment of the spindle 14 to the threads 146 in the nut 134.
  • the surface 69 (which may be an appropriate washer, spacer or a portion of the spindle) engages in a line fashion, the upper surface 170 of the domed or curved portion 162 of the side wall 152.
  • the cup is forced in a downward direction by such engagement.
  • the flange 128 and the cup 150 may be formed as an integral unit as is shown in FIGURE 12. If such is desired, the composite nut-flange may be stamped from a single piece of sheet metal to provide the desired depression area 180 to accommodate the raised portion 24 of the depressed center wheel. From the central section of the body 182 there would be extended the side walls 184 of the cup with the inwardly turned end 186 to provide the dome structure 188 as 17 above described. As desired, the reinforcing ring 190 may also be included.
  • 0 wheels utilize the throw away hub while the four, four and one half and five inch wheel utilize the . conventional two-piece mounting set traditional in the prior art and as above described.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

Appareil de meulage jetable, comme par exemple une meule (10) à centre concave, destiné à être monté sur une broche (14) filetée rotative d'un outil motorisé (16). La meule (10) comporte sur l'un de ses côtés un écrou de blocage (44) et de l'autre côté une bride support (28), les deux étant immobilisés de manière non amovible sur la meule (10) sans l'aide de matière adhésive, de manière que la meule soit mise en compression lorsqu'elle est fixée, à l'état de fonctionnement sur la broche de l'outil motorisé et soumise à des charges de meulage. L'écrou (44) et la bride (28) sont fixés l'un à l'autre en refoulant une extrémité (52) de l'écrou (44), de façon qu'elle dépasse vers l'extérieur sur la surface de la bride (28). Un ensemble de base (60) est fixé sans serrage à la broche (14) de l'outil motorisé (16) de manière à venir en contact avec la surface extérieure (38) de la bride support (28) pendant le fonctionnement de la meule (10). Dans une variante, un capuchon de pression (90) est fixé à la partie (56) en saillie vers l'extérieur de l'écrou (44) afin de venir en contact avec un épaulement réalisé sur la broche de l'outil motorisé, et ce, pendant le fonctionnement de la meule.
PCT/US1987/000716 1986-04-03 1987-03-27 Appareil de meulage jetable equipe d'un moyeu de montage incorpore WO1987005847A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US06/847,793 US4694615A (en) 1986-04-03 1986-04-03 Disposable depressed center grinding wheel having an integral mounting hub
US847,793 1986-04-03
US005,813 1987-01-21
US07/005,813 US4754578A (en) 1986-04-03 1987-01-21 Disposable depressed center grinding wheel having an integral mounting hub including a pressure cap
US005,812 1987-01-21
US07/005,812 US4760670A (en) 1986-04-03 1987-01-21 Disposable depressed center grinding wheel having an integral mounting hub

Publications (1)

Publication Number Publication Date
WO1987005847A1 true WO1987005847A1 (fr) 1987-10-08

Family

ID=27357963

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1987/000716 WO1987005847A1 (fr) 1986-04-03 1987-03-27 Appareil de meulage jetable equipe d'un moyeu de montage incorpore

Country Status (6)

Country Link
EP (1) EP0318476A4 (fr)
JP (1) JPH01500578A (fr)
CN (1) CN1008894B (fr)
AU (1) AU595604B2 (fr)
CA (1) CA1305860C (fr)
WO (1) WO1987005847A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0596842A1 (fr) * 1992-11-06 1994-05-11 TAF S.r.l. Disque de ponçage pour machines de superfinition comprenant des moyens d'accomplement améliorés
WO2008088925A2 (fr) * 2007-01-12 2008-07-24 I.T., Inc. Ensembles de meulage pour utilisation avec des outils électriques à main

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8430725B2 (en) 2008-12-19 2013-04-30 Jovan Pajovic Abrasive disc construction
CN105415212A (zh) * 2015-11-25 2016-03-23 宁波大华砂轮有限公司 一种金属丝抛光轮
JP7138452B2 (ja) * 2018-03-01 2022-09-16 株式会社ディスコ フランジ機構
CN110052933B (zh) * 2018-06-05 2021-04-13 弗兰克温特 一种含玻璃纤维的磨片装配锁紧系统及角磨机
CN115229696B (zh) * 2022-08-03 2023-03-31 广东创汇实业有限公司 一种带紧固件的砂轮切割片

Citations (7)

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Publication number Priority date Publication date Assignee Title
US489149A (en) * 1893-01-03 Construction of emery-wheels and supports therefor
US872932A (en) * 1905-12-26 1907-12-03 Lincoln Earnest Hall Polishing-wheel and mandrel therefor.
US2278301A (en) * 1941-02-12 1942-03-31 Abrasive Company Grinding wheel
US3879178A (en) * 1973-07-02 1975-04-22 Norton Co Discard mount for disc type grinding wheel
US4322920A (en) * 1979-10-29 1982-04-06 Wells Raymond E Rotary floor conditioning machine attachment
US4439953A (en) * 1981-11-16 1984-04-03 Merit Abrasive Products, Inc. Abrasive disc holder
US4449329A (en) * 1982-08-06 1984-05-22 Black & Decker Inc. Composite washer assembly

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Publication number Priority date Publication date Assignee Title
US3623281A (en) * 1969-06-16 1971-11-30 Robert H Moffat Mounting fixture
US3912411A (en) * 1971-09-22 1975-10-14 Robert H Moffat Thread latching mechanism
US4794737A (en) * 1987-03-06 1989-01-03 Black & Decker Inc. Universal backing flange

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US489149A (en) * 1893-01-03 Construction of emery-wheels and supports therefor
US872932A (en) * 1905-12-26 1907-12-03 Lincoln Earnest Hall Polishing-wheel and mandrel therefor.
US2278301A (en) * 1941-02-12 1942-03-31 Abrasive Company Grinding wheel
US3879178A (en) * 1973-07-02 1975-04-22 Norton Co Discard mount for disc type grinding wheel
US4322920A (en) * 1979-10-29 1982-04-06 Wells Raymond E Rotary floor conditioning machine attachment
US4439953A (en) * 1981-11-16 1984-04-03 Merit Abrasive Products, Inc. Abrasive disc holder
US4449329A (en) * 1982-08-06 1984-05-22 Black & Decker Inc. Composite washer assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0318476A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0596842A1 (fr) * 1992-11-06 1994-05-11 TAF S.r.l. Disque de ponçage pour machines de superfinition comprenant des moyens d'accomplement améliorés
WO2008088925A2 (fr) * 2007-01-12 2008-07-24 I.T., Inc. Ensembles de meulage pour utilisation avec des outils électriques à main
WO2008088925A3 (fr) * 2007-01-12 2008-10-09 I T Inc Ensembles de meulage pour utilisation avec des outils électriques à main

Also Published As

Publication number Publication date
EP0318476A4 (fr) 1990-02-20
CN87102592A (zh) 1987-10-14
AU595604B2 (en) 1990-04-05
CN1008894B (zh) 1990-07-25
AU7301487A (en) 1987-10-20
CA1305860C (fr) 1992-08-04
JPH01500578A (ja) 1989-03-01
EP0318476A1 (fr) 1989-06-07

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